Umlaufberg

View of a circulating valley of the Neckar north of Rottweil and of Umlaufberge with the Neckarburg (far right on the photo). To the right of this is a map showing the location, the direction in which the photographer is looking (red arrow) and the presumed earlier course of the Neckar there (blue dashed line).

A circulating mountain is the significantly increased terrain within the loop of a river valley meander that remained after its breakthrough. The valley of the former loop of the river, which is often only drained by a small watercourse or is completely dry, is called the Umlauftal . Occasionally, terrain that is much higher up and is surrounded by a loop of river is also called this, although it is not completely isolated from the surrounding plateau.

Emergence

In meandering rivers, the outer banks of the river bends erode, creating so-called impact slopes . In so-called freely meandering rivers, the eroded bed load is sedimented again on the bank of the inside of the curve , where sliding slopes are created . As a result of this process, the course of the river is deflected further and further sideways, creating distinct river loops, the meanders. With meandering rivers in the area of ​​plateaus, the river cuts through deep erosion at the same time into the terrain. The resulting valley shape is called a valley or forced meander . With free meanders as well as with forced meanders, two neighboring river loops can approach each other so far that there is a breakthrough between them and thus a shortening of the course . In the case of a forced meandering river, the previously curved extension of the plateau, the meander spur , is isolated and is now referred to as a mountain. Since the shortened river cuts into the plateau there due to the increase in the gradient , the valley section of the oxbow lake known as the Umlauftal falls largely dry in a relatively short time.

See also

• Kamianets-Podilskyj , an old settlement on a mountain

Web links

Wiktionary: Umlaufberg  - explanations of meanings, word origins, synonyms, translations

Individual evidence

1. ↑ ^{a b} Umlaufberg. Spectrum online encyclopedia of geography
2. ↑ ^{a b} Umlaufberg. Spectrum online encyclopedia of geosciences
3. ↑ cf. Theresia Markut: The Umlaufberg in the Thayatal - a mountain full of life. Treatises of the zoological-botanical society in Austria. Vol. 38 ( National parks in Austria. GEO Day of Species Diversity 2010 ), 2012, pp. 169–213 ( PDF )
4. ^ Hans Murawski, Wilhelm Meyer: Geological dictionary . 12th edition. Spektrum Akademischer Verlag, Heidelberg 2010, ISBN 978-3-8274-1810-4 , pp. 176 .